Security Bulletin
Summary
IBM Rational Developer for System z is shipped with an IBM Java that is based on the Oracle Java. Oracle has released a June 2012 critical patch updates (CPU) which contain security vulnerability fixes and the IBM Java is affected.
Vulnerability Details
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CVE ID: CVE-2012-1713
Description: This issue involves a buffer overrun in the Java platform's Font parsing code. An attacker can potentially place arbitrary data into any location on the host machine using a maliciously crafted font file.
This issue involves an internal cache in the Java platform's font scaling code, which may incorrectly be freed from memory by one part of the code (on an error condition) while it is still in use by another. This scenario will usually lead to a crash.
An attacker may access arbitrary data within the process address space by crafting a malicious font with invalid character map (CMAP) data. Specifically, an attacker can inject an offset which points to a location outside the CMAP data block.
An attacker is potentially be able to pass execution to arbitrary code under certain circumstances via a malicious font file containing a specially crafted hinting program.
CVSS Base Score: 10
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/76239 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: Undefined
Remediation/Fixes
Upgrade to Rational Developer for System z 8.5.1 which includes an updated IBM Java version which addresses these security issues.
Workarounds and Mitigations
None
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Important Note
IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk.
References
IBM Security Alerts: Oracle June 2012 Security Alert.
Oracle Java SE Critical Patch Update Advisory - June 2012: Oracle Java SE Critical Patch Update Advisory - June 2012.
Acknowledgement
None
Change History
*
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
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Document Information
Modified date:
27 October 2020
UID
swg21616522